World tennis number one Naomi Osaka has split from her coach Sascha Bajin just 17 days after completing back-to-back Grand Slam victories at the Australian Open. "Hey everyone, I will no longer be working together with Sascha. I thank him for his work and wish him all the best in the future," the 21-year-old Japanese tweeted in a shock announcement.

Copyright Agence France-Presse, 2019